is-defined-eval
Checks if a variable is defined.
(Eval)uates a variable identifier
like this:
'typeof ' + identifier + ' !== "undefined"'
Consider it as a shortcut to the above.
Example (on nodejs in console):
const isDefined = ; var exportsExists = ;console; // => true var windowExists = ;console; // => false var documentExists = ;console; // => false
License MIT